Book

Yoga C. J. Bowers (Swami Yoga Christopher)
English
UK, 2013
blurb.co.uk

Rico Provasoli (Swami Prem Richard)
English
Humble Press, USA, 2009
OshoViha

Source Wikipedia
English
Books LLC, Wiki Series, USA, 2011 – ISBN 978-1155904368
amazon.in

Ram Chandra Prasad (Swami Anand Vairagya)
English, Hindi
Motilal Banarsidass, India, 1978 – ASIN: B000KBP6A8
amazon.c

Lars Strömsdörfer
German
Pabel, Germany, 1978 – ASIN B0025WVQI6
amazon.de

Theodore L. Shay, Ph.D.
English
Scout Creek Press, USA, 1985

Yvonne Hoeber
German
Diplomarbeiten Agentur, Germany, 2004 – ISBN 978-3838682815

Mary Daly
English
Dept. of Geography, Syracuse University, USA, 1985

Kirk Braun
English
Scout Creek Press, USA, 1984 – ISBN 978-0930219000
amazon.com – amazon.co.uk

Christopher S. Hyatt
English
New Falcon Publications, USA, 2008 – ISBN 978-1561841530
amazon.com – amazon.co.uk